It backfeeds onto the grid and becomes the utility companies problem to deal with. This is similar to them dealing with a house that is an unbalanced consumer between the legs.
To my understanding, it is basically a non-issue at residential voltages. To be a problem it would require all the houses on a transformer (there are typically just a few for each transformer) to be unbalanced significantly in the same direction. That would be the end of it, too, because the 240V split only happens at the transformer.
To my understanding, it is basically a non-issue at residential voltages. To be a problem it would require all the houses on a transformer (there are typically just a few for each transformer) to be unbalanced significantly in the same direction. That would be the end of it, too, because the 240V split only happens at the transformer.